Drill bit

Drill bits are the cutters of drill tools. Bits are interchangeable, meaning that they can be removed from the end of the drill, either to replace a worn part or to change the size of the part.

Countersink bit

• This section currently under construction.

Countersink bits are used to make a shallow recess with angled sides in the material, to contain a screw head, so the head of the screw will be flush with the surface instead of protruding.

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This bit style may be combined with a twist pilot bit, to allow a pilot hole for the screw and the countersink for the head to be drilled in one step, with no bit change required.

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